<!doctype html>
<html lang="en">
<head>
    <title>Code coverage report for components/BackToTop/index.vue</title>
    <meta charset="utf-8" />
    <link rel="stylesheet" href="../../prettify.css" />
    <link rel="stylesheet" href="../../base.css" />
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <style type='text/css'>
        .coverage-summary .sorter {
            background-image: url(../../sort-arrow-sprite.png);
        }
    </style>
</head>
<body>
<div class='wrapper'>
  <div class='pad1'>
    <h1>
      <a href="../../index.html">All files</a> / <a href="index.html">components/BackToTop</a> index.vue
    </h1>
    <div class='clearfix'>
      <div class='fl pad1y space-right2'>
        <span class="strong">0% </span>
        <span class="quiet">Statements</span>
        <span class='fraction'>0/29</span>
      </div>
      <div class='fl pad1y space-right2'>
        <span class="strong">0% </span>
        <span class="quiet">Branches</span>
        <span class='fraction'>0/8</span>
      </div>
      <div class='fl pad1y space-right2'>
        <span class="strong">0% </span>
        <span class="quiet">Functions</span>
        <span class='fraction'>0/8</span>
      </div>
      <div class='fl pad1y space-right2'>
        <span class="strong">0% </span>
        <span class="quiet">Lines</span>
        <span class='fraction'>0/28</span>
      </div>
    </div>
  </div>
  <div class='status-line low'></div>
<pre><table class="coverage">
<tr><td class="line-count quiet">1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112</td><td class="line-coverage quiet"><span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-no">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-no">&nbsp;</span>
<span class="cline-any cline-no">&nbsp;</span>
<span class="cline-any cline-no">&nbsp;</span>
<span class="cline-any cline-no">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-no">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-no">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-no">&nbsp;</span>
<span class="cline-any cline-no">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-no">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-no">&nbsp;</span>
<span class="cline-any cline-no">&nbsp;</span>
<span class="cline-any cline-no">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-no">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-no">&nbsp;</span>
<span class="cline-any cline-no">&nbsp;</span>
<span class="cline-any cline-no">&nbsp;</span>
<span class="cline-any cline-no">&nbsp;</span>
<span class="cline-any cline-no">&nbsp;</span>
<span class="cline-any cline-no">&nbsp;</span>
<span class="cline-any cline-no">&nbsp;</span>
<span class="cline-any cline-no">&nbsp;</span>
<span class="cline-any cline-no">&nbsp;</span>
<span class="cline-any cline-no">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-no">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-no">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-no">&nbsp;</span>
<span class="cline-any cline-no">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span>
<span class="cline-any cline-neutral">&nbsp;</span></td><td class="text"><pre class="prettyprint lang-js">&lt;template&gt;
  &lt;transition :name="transitionName"&gt;
    &lt;div
      v-show="visible"
      :style="customStyle"
      class="back-to-ceiling"
      @click="backToTop"
    &gt;
      &lt;svg-icon
        name="back-top"
        class="backTopIcon"
      /&gt;
    &lt;/div&gt;
  &lt;/transition&gt;
&lt;/template&gt;
&nbsp;
&lt;script lang="ts"&gt;
<span class="cstat-no" title="statement not covered" >import { Component, Prop, Vue } from 'vue-property-decorator'</span>
&nbsp;
<span class="fstat-no" title="function not covered" >@Component({</span>
  name: 'BackToTop'
})
<span class="cstat-no" title="statement not covered" ><span class="cstat-no" title="statement not covered" >export default class extends Vue {</span></span>
<span class="cstat-no" title="statement not covered" >  @Prop({ default: 400 }) private visibilityHeight!: number</span>
<span class="cstat-no" title="statement not covered" >  @Prop({ default: 'fade' }) private transitionName!: string</span>
<span class="cstat-no" title="statement not covered" >  @Prop({ default: 0 }) private backPosition!: number</span>
  @Prop({
<span class="fstat-no" title="function not covered" >    default: () =&gt; {</span>
<span class="cstat-no" title="statement not covered" >      return {</span>
        right: '50px',
        bottom: '50px',
        width: '40px',
        height: '40px',
        'border-radius': '4px',
        'line-height': '45px',
        background: '#e7eaf1'
      }
    }
<span class="cstat-no" title="statement not covered" >  }) private customStyle!: object</span>
&nbsp;
<span class="cstat-no" title="statement not covered" >  private visible = false</span>
<span class="cstat-no" title="statement not covered" >  private isMoving = false</span>
  private interval?: number
&nbsp;
<span class="fstat-no" title="function not covered" >  mounted() {</span>
<span class="cstat-no" title="statement not covered" >    window.addEventListener('scroll', this.handleScroll)</span>
  }
&nbsp;
<span class="fstat-no" title="function not covered" >  beforeDestroy() {</span>
<span class="cstat-no" title="statement not covered" >    window.removeEventListener('scroll', this.handleScroll)</span>
<span class="cstat-no" title="statement not covered" >    if (this.interval) {</span>
<span class="cstat-no" title="statement not covered" >      clearInterval(this.interval)</span>
    }
  }
&nbsp;
<span class="fstat-no" title="function not covered" >  private handleScroll() {</span>
<span class="cstat-no" title="statement not covered" >    this.visible = window.pageYOffset &gt; this.visibilityHeight</span>
  }
&nbsp;
<span class="fstat-no" title="function not covered" >  private backToTop() {</span>
<span class="cstat-no" title="statement not covered" >    if (this.isMoving) return</span>
<span class="cstat-no" title="statement not covered" >    const start = window.pageYOffset</span>
<span class="cstat-no" title="statement not covered" >    let i = 0</span>
<span class="cstat-no" title="statement not covered" >    this.isMoving = true</span>
<span class="cstat-no" title="statement not covered" ><span class="fstat-no" title="function not covered" >    const interval = setInterval(() =&gt; {</span></span>
<span class="cstat-no" title="statement not covered" >      const next = Math.floor(this.easeInOutQuad(10 * i, start, -start, 500))</span>
<span class="cstat-no" title="statement not covered" >      if (next &lt;= this.backPosition) {</span>
<span class="cstat-no" title="statement not covered" >        window.scrollTo(0, this.backPosition)</span>
<span class="cstat-no" title="statement not covered" >        clearInterval(interval)</span>
<span class="cstat-no" title="statement not covered" >        this.isMoving = false</span>
      } else {
<span class="cstat-no" title="statement not covered" >        window.scrollTo(0, next)</span>
      }
<span class="cstat-no" title="statement not covered" >      i++</span>
    }, 16.7)
  }
&nbsp;
<span class="fstat-no" title="function not covered" >  private easeInOutQuad(t: number, b: number, c: number, d: number) {</span>
<span class="cstat-no" title="statement not covered" >    if ((t /= d / 2) &lt; 1) return (c / 2) * t * t + b</span>
<span class="cstat-no" title="statement not covered" >    return (-c / 2) * (--t * (t - 2) - 1) + b</span>
  }
}
&lt;/script&gt;
&nbsp;
&lt;style lang="scss" scoped&gt;
.back-to-ceiling {
  position: fixed;
  display: inline-block;
  text-align: center;
  cursor: pointer;
&nbsp;
  :hover {
    background: #d5dbe7;
  }
}
&nbsp;
.fade-enter-active,
.fade-leave-active {
  transition: opacity 0.5s;
}
&nbsp;
.fade-enter,
.fade-leave-to {
  opacity: 0;
}
&nbsp;
.back-to-ceiling .backTopIcon {
  fill: #9aaabf;
  background: none;
}
&lt;/style&gt;
&nbsp;</pre></td></tr>
</table></pre>
<div class='push'></div><!-- for sticky footer -->
</div><!-- /wrapper -->
<div class='footer quiet pad2 space-top1 center small'>
  Code coverage
  generated by <a href="https://istanbul.js.org/" target="_blank">istanbul</a> at Mon Aug 05 2019 17:01:25 GMT+0800 (GMT+08:00)
</div>
</div>
<script src="../../prettify.js"></script>
<script>
window.onload = function () {
        if (typeof prettyPrint === 'function') {
            prettyPrint();
        }
};
</script>
<script src="../../sorter.js"></script>
</body>
</html>
